中国的崛起和俄罗斯的复兴挑战了自由民主是唯一可行的政府形式的观念。
The rise of China and the resurgence of Russia have challenged the idea that liberal democracy is the only viable form of government.
In science, the most exciting phrase is not 'Eureka!' but 'That's funny...'
解析：菩提比喻智慧，明镜比喻清净心。本来清净，又哪里会染上什么尘埃？
You don't have to be brilliant, only a little bit wiser than the other guys, on average, for a long, long time.
I'm a work in progress. I'm not perfect, but I'm trying every day to be better.
战争是危险的领域，因此勇气是战士的首要品质。
